2 Kings 19:35-37
"35 And that night the angel of the Lord went out and struck down 185,000 in the camp of the Assyrians. And when people arose early in the morning, behold, these were all dead bodies. 36 Then Sennacherib king of Assyria departed and went home and lived at Nineveh. 37 And as he was worshiping in the house of Nisroch his god, Adrammelech and Sharezer, his sons, struck him down with the sword and escaped into the land of Ararat. And Esarhaddon his son reigned in his place."
And now the outworking of God's answer to Hezekiah's prayer in the discomfiture of Sennacherib and his host. The angel of the Lord moved among them, and mysteriously and miraculously smote them, breaking the invasion effectually. Moreover, Sennacherib, on re- turning to Assyria, was assassinated by his own sons (see 7) according to the word of the Lord. There is no greater instance of the rewards of faith in the whole of the Old Testament than this, and it is all the more wonderful to read it here, after so much tragic declension for so many generations. How good God is, and how eager to respond to any signs of real faith and desire for His will! Nor should we fail to see here an instance of the strict justice of God at work. Sennacherib had arrogantly (through his servant Rabshakeh) challenged the living God in his attack on Judah, and now he is ignominiously and violently destroyed by his own sons. God is not mocked: whatsoever a man soweth, that shall he also reap. Sennacherib wielded the sword, and he perished by the sword. And as long as God is on the throne of the universe, this will always be the lot of insolent and arrogant dictators who go on tyrannising the people of God.